Question # 1

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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5 volt

3 volt

15 volt

9 volt

During the negative half-cycle of the half-wave rectification, the diode

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does not conduct

conducts

either of these

none of these

The most common source of alternating voltage is:

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Motor

Transformer

AC genrator

Both (A) and (C)

Both (A) and (B)

The size of the domain is such that they can contain

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10²to 10⁴atoms

10⁴ to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

The direction of the streamlines is the same as the direction of the

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force

torque

velocity

weight

Mass of neutron is

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1.67 x 10^-31kg

1.67 x 10^-27kg

9.1 x 10^-31kg

1.67 x 10^-19kg

If the objects of different masses move with the same velocity, then it is more difficult to stop the

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lighter of the two

massive of the two

any one of them

both of them

In the doping process, the ratio of the doping atoms to the semi conductor atom is

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1 to 10

1 to 10³

1 to 10⁶

1 to 10⁹

A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

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6 s

36 s

38 s

None of these

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

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decrease

increase

same

none of these

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

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Coulomb's law

Gauss's law

Biot-Sarwat law

Ampere's law

Two masses m₁ and m₂ have equal momentum their kinetic energies are in ratio of

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m₂: m₁

m²1 : m₂²

m₁: m₂

m₂^{2 :}m²1

The fringes produced in Young's double slit experiment will be wider if the distance between the two slits is

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small

large

zero

very large

Impulse is the force applied for a very short interval time in which force is

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Constant

Not constant

May be constant for some time

None of these

Bulk modulus for bass is

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20

41

61

81

A ballistic missile moves under the result of the superposition of

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one independent motion

two independent motions

one dependent motion

two dependent motions

SI unit of potential difference is volt it can be written as

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JC^-2

JC^-1

JC

J.A

A ball tied to the end of a string is swing into a vertical loop then the tension will be maximum at the

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Highest point

Bottom point

Neither at top nor at bottom

None of these

The acceleration of a motor car is 8 m/s².If the diameter of its wheel be 2 metre,its angular acceleration will be

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8 m/s²

8 radian /s²

16 m/s²

16 radian/s²

The contrast in the fringes in any interference pattern depends on

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Frings width

Intensity ratio of the sources

Distance between the slits

Wavelength

If d is the displacement of the body in time t, the its average velocity will be

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v_av= _{d x t}

v_av= t/d

v_av= d/t

v_{av = d/t}

A device which is based upon the thermodynamic property of matter is

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Thermometer

Thermo state

Heat engine

Calorimeter

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